mirror of
https://github.com/flyinghead/flycast.git
synced 2026-11-08 17:12:25 -10:00
RTA
bbe606c8f7
Request and propagate explicit OpenGL ES 3.1 contexts in libretro. Add the image-atomic and shader-storage support needed by OIT, validate per-pixel resource limits, and improve A-buffer synchronization and framebuffer buffer reuse.
220 lines
6.9 KiB
C++
220 lines
6.9 KiB
C++
/*
|
|
Created on: Oct 19, 2019
|
|
|
|
Copyright 2019 flyinghead
|
|
|
|
This file is part of Flycast.
|
|
|
|
Flycast is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Flycast is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Flycast. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "gl_context.h"
|
|
#if defined(LIBRETRO)
|
|
#include "libretro.h"
|
|
#elif defined(TARGET_IPHONE)
|
|
#include "osx.h"
|
|
#elif defined(USE_SDL)
|
|
#include "sdl.h"
|
|
#elif defined(__ANDROID__) || defined(SUPPORT_X11)
|
|
#include "egl.h"
|
|
#else
|
|
#error Unsupported window system
|
|
#endif
|
|
|
|
#ifndef LIBRETRO
|
|
#include "rend/gles/opengl_driver.h"
|
|
#endif
|
|
|
|
#include <cstring>
|
|
|
|
// GLES 3.0 headers used by libretro don't declare the GLES 3.1 limit
|
|
// tokens, even though the entry points are loaded dynamically.
|
|
#ifndef GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS
|
|
#define GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS 0x92DC
|
|
#endif
|
|
#ifndef GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE
|
|
#define GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE 0x92D8
|
|
#endif
|
|
#ifndef GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES
|
|
#define GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES 0x8F39
|
|
#endif
|
|
#ifndef GL_MAX_FRAGMENT_ATOMIC_COUNTERS
|
|
#define GL_MAX_FRAGMENT_ATOMIC_COUNTERS 0x92D6
|
|
#endif
|
|
#ifndef GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS
|
|
#define GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS 0x92D0
|
|
#endif
|
|
#ifndef GL_MAX_FRAGMENT_IMAGE_UNIFORMS
|
|
#define GL_MAX_FRAGMENT_IMAGE_UNIFORMS 0x90CE
|
|
#endif
|
|
#ifndef GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS
|
|
#define GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS 0x90DA
|
|
#endif
|
|
#ifndef GL_MAX_IMAGE_UNITS
|
|
#define GL_MAX_IMAGE_UNITS 0x8F38
|
|
#endif
|
|
#ifndef GL_MAX_SHADER_STORAGE_BLOCK_SIZE
|
|
#define GL_MAX_SHADER_STORAGE_BLOCK_SIZE 0x90DE
|
|
#endif
|
|
#ifndef GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS
|
|
#define GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS 0x90DD
|
|
#endif
|
|
|
|
static bool hasExtension(const char *extensions, const char *name)
|
|
{
|
|
if (extensions == nullptr)
|
|
return false;
|
|
const size_t nameLength = strlen(name);
|
|
for (const char *match = strstr(extensions, name); match != nullptr; match = strstr(match + nameLength, name))
|
|
{
|
|
const bool startsToken = match == extensions || match[-1] == ' ';
|
|
const bool endsToken = match[nameLength] == '\0' || match[nameLength] == ' ';
|
|
if (startsToken && endsToken)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool GLGraphicsContext::checkPerPixelSupport() const
|
|
{
|
|
const bool versionSupported = _isGLES
|
|
? majorVersion > 3 || (majorVersion == 3 && minorVersion >= 1)
|
|
: majorVersion > 4 || (majorVersion == 4 && minorVersion >= 3);
|
|
if (!versionSupported)
|
|
return false;
|
|
const bool imageAtomicsSupported = !_isGLES
|
|
|| majorVersion > 3 || (majorVersion == 3 && minorVersion >= 2)
|
|
|| hasExtension((const char *)glGetString(GL_EXTENSIONS), "GL_OES_shader_image_atomic");
|
|
|
|
GLint fragmentStorageBlocks = 0;
|
|
GLint fragmentImages = 0;
|
|
GLint fragmentAtomicCounters = 0;
|
|
GLint fragmentAtomicBuffers = 0;
|
|
GLint storageBindings = 0;
|
|
GLint imageUnits = 0;
|
|
GLint atomicBindings = 0;
|
|
GLint atomicBufferSize = 0;
|
|
GLint combinedOutputs = 0;
|
|
GLint64 storageBlockSize = 0;
|
|
glGetIntegerv(GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS, &fragmentStorageBlocks);
|
|
glGetIntegerv(GL_MAX_FRAGMENT_IMAGE_UNIFORMS, &fragmentImages);
|
|
glGetIntegerv(GL_MAX_FRAGMENT_ATOMIC_COUNTERS, &fragmentAtomicCounters);
|
|
glGetIntegerv(GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS, &fragmentAtomicBuffers);
|
|
glGetIntegerv(GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS, &storageBindings);
|
|
glGetIntegerv(GL_MAX_IMAGE_UNITS, &imageUnits);
|
|
glGetIntegerv(GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS, &atomicBindings);
|
|
glGetIntegerv(GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE, &atomicBufferSize);
|
|
glGetIntegerv(GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES, &combinedOutputs);
|
|
glGetInteger64v(GL_MAX_SHADER_STORAGE_BLOCK_SIZE, &storageBlockSize);
|
|
|
|
// Flycast PPLL uses two fragment SSBOs, one image, one atomic counter,
|
|
// and one color output in its resolve pass. A Pixel node is 16 bytes.
|
|
const bool supported = imageAtomicsSupported
|
|
&& fragmentStorageBlocks >= 2
|
|
&& fragmentImages >= 1
|
|
&& fragmentAtomicCounters >= 1
|
|
&& fragmentAtomicBuffers >= 1
|
|
&& storageBindings >= 2
|
|
&& imageUnits >= 1
|
|
&& atomicBindings >= 1
|
|
&& atomicBufferSize >= 4
|
|
&& combinedOutputs >= 4
|
|
&& storageBlockSize >= 16;
|
|
if (!supported)
|
|
{
|
|
WARN_LOG(RENDERER, "Per-pixel sorting resources unavailable: image atomics %s, fragment SSBOs %d, images %d, atomic counters %d/%d, bindings SSBO/image/atomic %d/%d/%d, combined outputs %d, block sizes %lld/%d",
|
|
imageAtomicsSupported ? "yes" : "no", fragmentStorageBlocks, fragmentImages, fragmentAtomicCounters, fragmentAtomicBuffers,
|
|
storageBindings, imageUnits, atomicBindings, combinedOutputs,
|
|
(long long)storageBlockSize, atomicBufferSize);
|
|
}
|
|
return supported;
|
|
}
|
|
|
|
void GLGraphicsContext::findGLVersion()
|
|
{
|
|
while (true)
|
|
if (glGetError() == GL_NO_ERROR)
|
|
break;
|
|
glGetIntegerv(GL_MAJOR_VERSION, &majorVersion);
|
|
if (glGetError() == GL_INVALID_ENUM)
|
|
majorVersion = 2;
|
|
else
|
|
{
|
|
glGetIntegerv(GL_MINOR_VERSION, &minorVersion);
|
|
}
|
|
const char *version = (const char *)glGetString(GL_VERSION);
|
|
_isGLES = !strncmp(version, "OpenGL ES", 9);
|
|
INFO_LOG(RENDERER, "OpenGL version: %s", version);
|
|
|
|
const char *p = (const char *)glGetString(GL_RENDERER);
|
|
driverName = p != nullptr ? p : "unknown";
|
|
p = (const char *)glGetString(GL_VERSION);
|
|
driverVersion = p != nullptr ? p : "unknown";
|
|
p = (const char *)glGetString(GL_VENDOR);
|
|
std::string vendor = p != nullptr ? p : "";
|
|
if (vendor.substr(0, 4) == "ATI ")
|
|
amd = true;
|
|
else if (driverName.find(" ATI ") != std::string::npos
|
|
|| driverName.find(" AMD ") != std::string::npos)
|
|
// mesa
|
|
amd = true;
|
|
else
|
|
amd = false;
|
|
|
|
perPixelSupported = checkPerPixelSupport();
|
|
if (perPixelSupported)
|
|
INFO_LOG(RENDERER, "OpenGL%s supports PPLL per-pixel sorting", _isGLES ? " ES" : "");
|
|
}
|
|
|
|
void GLGraphicsContext::postInit()
|
|
{
|
|
findGLVersion();
|
|
resetUIDriver();
|
|
}
|
|
|
|
void GLGraphicsContext::preTerm()
|
|
{
|
|
#ifndef LIBRETRO
|
|
imguiDriver.reset();
|
|
#endif
|
|
}
|
|
|
|
void GLGraphicsContext::resetUIDriver()
|
|
{
|
|
#ifndef LIBRETRO
|
|
imguiDriver.reset();
|
|
imguiDriver = std::unique_ptr<ImGuiDriver>(new OpenGLDriver());
|
|
#endif
|
|
}
|
|
|
|
void GLGraphicsContext::setSwapInterval(int interval)
|
|
{
|
|
if (interval <= 0 || interval == gameSwapInterval)
|
|
return;
|
|
gameSwapInterval = interval;
|
|
gameSwapIntervalChanged = true;
|
|
}
|
|
|
|
void GLGraphicsContext::Create(void *window, void *display)
|
|
{
|
|
#if defined(LIBRETRO)
|
|
LibretroGraphicsContext::Create(window, display);
|
|
#elif defined(TARGET_IPHONE)
|
|
OSXGraphicsContext::Create(window, display);
|
|
#elif defined(USE_SDL)
|
|
SDLGLGraphicsContext::Create(window, display);
|
|
#elif defined(__ANDROID__) || defined(SUPPORT_X11)
|
|
EGLGraphicsContext::Create(window, display);
|
|
#endif
|
|
}
|